串口显示乱码，串口用的是查询的方式，PC机用的是SecureCRT ，现在已经排除USB转串口线、波特率的问题。代码如附件。求大神帮忙，自己调试了好久也没结果。
#include "stm32f10x.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define TxBufferSize   (countof(TxBuffer))
/* Private macro -------------------------------------------------------------*/
#define countof(a)   (sizeof(a) / sizeof(*(a)))
/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;
uint8_t TxBuffer[] = "1234567890";
uint8_t TxCounter = 0;   
u32 i;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
 
/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Main program
  * @param  None
  * @retval : None
  */
int main(void)
{
  /* System Clocks Configuration */
  RCC_Configuration();
  /* Configure the GPIO ports */
  GPIO_Configuration();
/* USART1 and USART2 configuration ------------------------------------------------------*/
  /* USART and USART2 configured as follow:
        - BaudRate = 230400 baud 
        - Word Length = 8 Bits
        - One Stop Bit
        - Even parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = 115200;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_Even;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
 
  /* Configure USART1 */
  USART_Init(USART1, &USART_InitStructure);
  /* Enable the USART1 */
  USART_Cmd(USART1, ENABLE);
 while(TxCounter < TxBufferSize)
  {  
    /* Send one byte from USART1 to USART2 */
    USART_SendData(USART1, TxBuffer[TxCounter++]); 
    /* Loop until USART1 DR register is empty */ 
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET)
    {
  GPIO_SetBits(GPIOA, GPIO_Pin_1);//LED
  GPIO_SetBits(GPIOA, GPIO_Pin_4);//LED
  //break;
    }    
    for(i = 0; i < 100000; i++);   
   }
  while (1)
  {
  }
}
/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval : None
  */
void RCC_Configuration(void)
{
  /* Setup the microcontroller system. Initialize the Embedded Flash Interface, 
     initialize the PLL and update the SystemFrequency variable. */
  SystemInit();
   
  /* Enable USART1, GPIOA, GPIOD and AFIO clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA| RCC_APB2Periph_AFIO , ENABLE);
  /* Enable USART2 clock */
 // RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
}
/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval : None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  /* Configure USART1 Tx (PA.09) as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_4;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  /* Configure USART1 Rx (PA.10) as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;  //  GPIO_Mode_IN_FLOATING
  GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/**
  * @brief  Compares two buffers.
  * @param pBuffer1, pBuffer2: buffers to be compared.
  * @param BufferLength: buffer's length
  * @retval : PASSED: pBuffer1 identical to pBuffer2
  *   FAILED: pBuffer1 differs from pBuffer2
  */
#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *   where the assert_param error has occurred.
  * @param file: pointer to the source file name
  * @param line: assert_param error line source number
  * @retval : None
  */
void assert_failed(uint8_t* file, uint32_t line)
{
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* Infinite loop */
  while (1)
  {
  }
}
#endif
/**
  * @}
  */
/**
  * @}
  */
/******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/
 

硬件是否将电平进行转换？